<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8">
		<meta http-equiv="X-UA-Compatible" content="IE=edge">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
		<title>Demo</title>
	</head>
	<style>
		.bubble {
			position: relative;
			height: 130px;
			line-height: 30px;
			border-radius: 14px;
			background-color: rgba(0, 0, 0, 50%);
			display: table;
		}

		.bubble::after {
			position: absolute;
			bottom: -10px;
			right: 10px;
			content: '';
			border: 10px solid transparent;
			transform: rotate(90deg);
			border-left-color: rgba(0, 0, 0, 50%);
		}
	</style>
	<body>
		<span class="bubble">
			1313113123123
		</span>
		<script>
			let oContent = document.querySelector('.bubble');
			oContent.innerHTML = '123'.repeat(2)
		</script>
	</body>
</html>
